CVE-2026-116680 Homebox generic notifier SSRF via HTTP redirect after URL validation
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116680?
CVE-2026-116680 is a medium-severity vulnerability in sysadminsmedia homebox, published on 27 Oct 2026.
Official description
HomeBox is a home inventory and organization system. Prior to version 0.27.0, Homebox validates generic notifier URLs with ValidateNotifierURL before creation, update, testing, and scheduled delivery, but shoutrrr sends the request through http.DefaultClient.Do without a CheckRedirect policy that revalidates each Location target. An authenticated collection member can configure a permitted notifier host that redirects to loopback, link-local, cloud metadata, or another blocked destination, causing the follow-up request to bypass the product's SSRF policy. The flaw is reachable through POST /api/v1/notifiers/test for immediate requests and through stored notifiers during scheduled maintenance delivery. This issue is fixed in version 0.27.0.
Weakness: CWE-918
Which versions are affected by CVE-2026-116680?
How do I fix CVE-2026-116680?
No fix has been published for CVE-2026-116680 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116680 being exploited?
There is no known exploitation of CVE-2026-116680 in the wild and no public exploit code.
Sources
Also known as GHSA-4gp5-59x3-vhhg.